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3 years ago

(please explain)

Mathematics

2 answers:

Andrei [34K]3 years ago

7 0

B 3/12 divided by 3/3 = 1/4

garik1379 [7]3 years ago

7 0

B.) 1/4 it could be that or 2/8 either way but yea hope this helps

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Please help ! I’ll give you a lot of points !

True [87]

Answer:

Step-by-step explanation:

The mean is another word for average

Add the number of goals

3+7+2 = 12

Divide by the number of data points

12/3 = 4

The mean is 4

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3 years ago

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Factor the following trinomial. (Hint: Solve the equations first.) x²-2x-2

Alex_Xolod [135]

Answer:

$(x-(1+\sqrt{3}))(x-(1-\sqrt{3}))$

Step-by-step explanation:

we know that

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$x^{2} -2x-2=0$

$a=1\\b=-2\\c=-2$

substitute in the formula

$x=\frac{-(-2)(+/-)\sqrt{-2^{2}-4(1)(-2)}} {2(1)}$

$x=\frac{2(+/-)\sqrt{12}} {2}$

$x=\frac{2(+/-)2\sqrt{3}} {2}$

$x_1=\frac{2(+)2\sqrt{3}} {2}=1+\sqrt{3}$

$x_2=\frac{2(-)2\sqrt{3}} {2}=1-\sqrt{3}$

therefore

$x^{2} -2x-2=(x-(1+\sqrt{3}))(x-(1-\sqrt{3}))$

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3 years ago

40% of an hour in minutes and secs

olga55 [171]

Answer:

40% of an hour equals: 24 minutes

40% of an hour also equals: 1440 seconds

Skills needed: Time Units Conversion

Step-by-step explanation:

1) First, we need to understand how to convert between hours, minutes, and seconds.

There are 60 minutes in 1 hour ==> 1 hour = 60 minutes

There are 60 seconds in 1 minute ==> 1 minute = 60 seconds

- This means that there are 3600 seconds in 1 hour ( $60*60=3600$ )

- This also means that there are 60 minutes in 1 hour

2) We are trying to find how many minutes (or seconds) 40% of an hour is.

---> When converted to decimal, $40\%=\frac{40}{100}=0.4$

40% of an hour = 0.4 hours

Since there are 60 minutes in an hour, there are $60*0.4$ minutes in 0.4 hours. $60*0.4=24$ so, 24 minutes in 0.4 hours.

Since there are 3600 seconds in an hour, there are $3600*0.4$ seconds in 0.4 hours. $3600*0.4=1440$ so, 1440 seconds in 0.4 hours.

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2 years ago

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You want to know how many miles harriet went. which situation about her exercise best represents the inequality 15x 7 > 52?

Lady_Fox [76]

The answer is either a or d but we know she did all of this for more than 52 minutes.

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3 years ago

Every year, Aunt linda spends $36 on a dozen candy bunnies for her nephews and nieces. This year, she has to buy 15 bunnies. If

AleksAgata [21]

If 12 divided by 36 is 3 then multiply 15 by 3 to get 45 as the answer

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